Focused pinhole gamma detection device
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United States of America Patent
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Nov 29, 2011
Grant Date -
Jun 25, 2009
app pub date -
Dec 18, 2008
filing date -
Dec 21, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
The invention provides a gamma detection device, a collimator for use therein, and use of such a collimator or device in imaging an object. The invention is directed to pinhole imaging with high energy photons, such as 511 keV photons. In order to achieve sufficiently low pinhole knife edge penetration, the collimator uses a plurality of focused clusters of pinholes, each with a smaller opening angle, and arranged such that all the combined fields of view of the individual pinholes in all clusters provide a large central field of view with still compact dimensions of the detection device. This is made possible since the field of view of a single cluster is divided up into a number of individual fields of view.
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